Small Tinderbox Multifuel Stove, 5kW, ECODesign with up and out full height kit (137-SMF-TBOX-outside)
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Fast deliveryMonday, November 17th*
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Best PriceCall us to beat any price you found online.
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At a Glance
- Efficient 5kW heating for small to medium-sized rooms
- Versatile operation using both wood and smokeless fuels
- Engineered with an up and out full height kit for external installations
- EcoDesign approved ensuring reduced emissions and high efficiency
- Complete package with essential TWPro components for a safe installation
- Free design service to help tailor your installation to your space
We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: sales@nationalflues.com
- Details
- Specs
- Install/Packs
- FAQs
Ready for installation. A full external flue system that runs up the outside of a two storey building. Ideal when internal routing isn’t practical. No chimney required. Our experts offer a free design service if you need a variation on this system. Give us a call on 01670 206 999 if you think you might need a few changes to this standard kit.
Small Tinderbox Multifuel Stove - with up and out full height kit... Discover the ultimate eco-friendly heating solution with our Small Tinderbox Multifuel Stove package! Boasting a 5kW output and ECODesign approval, this up and out full height kit is perfect for external installations.
Enjoy versatile heating with both wood and smokeless fuel options, coupled with a complete TWPro package including all essential components. With our free design service, creating an efficient, sustainable heating setup has never been easier. Transform your space with reliable performance and modern design.
SKU: 137-SMF-TBOX-outside
Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, November 17th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.
About National Flues Ltd +
We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.
This is us — real advice over the phone, or at the counter, and real stock in our warehouse.
| SKU | Product Name | Qty |
|---|---|---|
| 37-125-005 | TWPro MB - Flat Adaptor - Ø 125 | 1 |
| 37-125-016 | TWPro MB - Adjustable Pipe 250-350mm - Ø 125 | 1 |
| 37-125-031 | TWPro MB - 45° Bend - Ø 125 | 1 |
| 37-125-010 | TWPro MB - Pipe 1000mm - Ø 125 | 7 |
| 37-125-034 | TWPro MB - 135° Tee - Ø 125 | 1 |
| 37-125-036 | TWPro MB - Tee Cap - Ø 125 | 1 |
| 37-125-011 | TWPro MB - Pipe 500mm - Ø 125 | 1 |
| 37-125-112 | TWPro MB - Rain Cap with Mesh - Ø 125 | 1 |
| 58-125-160 | TWPro MB - Retro Fit Base Support - Ø 125 | 1 |
| 58-125-052 | TWPro MB - Wall Support 80-130mm - Ø 125 | 3 |
| 15-125-100 | Wall Sleeve 45° Adjustable - Ø 125 | 1 |
| 58-125-114 | TWPro MB - MB Round Finishing Plate 45° (1 Piece) - Ø 125 | 1 |
| 58-125-097 | TWPro MB - Finishing Plate 30°-45° - Ø 125 | 1 |
| 37-125-012 | TWPro MB - Pipe 250mm - Ø 125 | 1 |
| Technical Specifications | |
|---|---|
| Nominal Heat Output | 5kW |
| Heat Output Range | 4-7.5kW |
| Energy Efficiency Rating | A+ |
| Wood Burning Efficiency | 81% |
| CO Emissions | 0.09% @ 13% O2 |
| Maximum Log Length | 480mm |
| Flue Outlet | 5' Top or Rear |
| Dimensions | 550mm (H) x 579mm (W) x 383mm (D) |
| Weight | 86kg |
| Eco Design Approved | Yes |
| Smoke Control Exempt | Yes |
| Cleanburn System | Yes |
| Airwash System | Yes |
| Direct Air Kit | Optional |
| Grate Option | Optional |
| Package Components Details | 37-125-005, 37-125-012, 37-125-011, `SKU`, 37-125-010, 37-125-016, 37-125-031, `SKU`, 37-125-034, 37-125-036, 58-125-160, `SKU`, 58-125-052, 37-125-112, 58-125-097, `SKU`, 58-125-114, 15-125-100 (TWPro MB - Flat Adaptor - Ø 125, TWPro MB - Pipe 250mm - Ø 125, TWPro MB - Pipe 500mm - Ø 125, `Product_Name`, TWPro MB - Pipe 1000mm - Ø 125, TWPro MB - Adjustable Pipe 250-350mm - Ø 125, TWPro MB - 45° Bend - Ø 125, `Product_Name`, TWPro MB - 135° Tee - Ø 125, TWPro MB - Tee Cap - Ø 125, TWPro MB - Retro Fit Base Support - Ø 125, `Product_Name`, TWPro MB - Wall Support 80-130mm - Ø 125, TWPro MB - Rain Cap with Mesh - Ø 125, TWPro MB - Finishing Plate 30°-45° - Ø 125, `Product_Name`, TWPro MB - MB Round Finishing Plate 45° (1 Piece) - Ø 125, Wall Sleeve 45° Adjustable - Ø 125) |
| Package Components | 37-125-005, 37-125-012, 37-125-011, `SKU`, 37-125-010, 37-125-016, 37-125-031, `SKU`, 37-125-034, 37-125-036, 58-125-160, `SKU`, 58-125-052, 37-125-112, 58-125-097, `SKU`, 58-125-114, 15-125-100 |
Need a complete stove & installation kit?
Choose your package - each includes the premium stove and the complete installation kit in the price. For single-storey builds (garden rooms, extensions), pick the Single Storey Kit - no existing chimney needed. In two-storey homes, choose the Internal Two-Storey Kit (flue routes inside and out through the roof) or the External Two-Storey Kit (flue runs up the outside) - neither requires a chimney. If you already have a chimney, the Chimney Pack includes a 10 m liner and everything to connect and safely line it. Need a tweak or a custom layout? Our experts offer a free design service - call 01670 206 999.
